Stack rain removal

Conditions and challenges

Some coal fired power plants experience problems with the so called “Gypsum Rain” phenomenon, which means that the wet exhaust gas leaving the scrubber will be not reheated before entering the stack. The mist eliminator is working correctly, but the wet gas will condensate at the cold stack wall. Condensate droplets won’t be separated and will be thrown out with the gas stream and contaminate the surroundings.

What we can do for you

By Munters Helix Mist Eliminator which consists of a helical drainage gutter, a film trap and the drainage system, the flow is set into rotation smoothly by the helical drainage gutter. Droplets are separated at the wall and drained by the Helix itself and the film trap.

Our solution – your benefit

Droplets smaller than the 300 µm are not supposed to fall to the ground because they evaporate or disappear with the waste gas plume. Using Munters Helix Mist Eliminator can achieve the separation of large droplets bigger than 300 µm giving the benefit of a lower pressure drop.